| 摘要 |
PROBLEM TO BE SOLVED: To provide a production process of a biphenyltetracarboxylic acid tetraester, performing oxidative dimerization reaction of a phthalic acid diester in the presence of a palladium compound-containing catalyst at a high temperature while molecular oxygen is supplied in a reaction mixture solution, wherein the production process requires neither specific equipment nor complex operation, can utilize the catalyst effectively, easily control the reaction and continuously produce, and is economical and improved. SOLUTION: A production process of a biphenyltetracarboxylic acid tetraester is characterized by carrying out, in parallel, a step of continuously or intermittently supplying to a reactor a catalyst containing a phthalic acid diester and a palladium compound, a step of conducting oxidative dimerization reaction of the phthalic acid diester in a temperature range of≥140°C but <250°C while supplying molecular oxygen to the reactor, and a step of continuously or intermittently removing a portion of the reaction mixture from the reactor. COPYRIGHT: (C)2009,JPO&INPIT
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